Hole saw KWB 499175 — 75 mm diameter, bi-metal cutting tool

KWB Hole Saw 499175 — 75 mm diameter, bi-metal cutting tool is designed to cut clean, circular openings in wood, plastic and thin metal sheets. The tool features a 75 mm cutting diameter and a bi-metal construction that combines flexibility and hardness to resist wear during repeated use. It is compatible with standard arbors and is intended for tasks in construction, electrical installation and plumbing where precise large-diameter holes are required.

Advantages

The bi-metal blade construction extends tool life by providing high wear resistance while maintaining toughness to reduce breakage. A 75 mm cutting diameter gives a standardized size for common installations such as conduit, pipe and cable pass-throughs. Compatibility with standard arbors simplifies mounting on drills and drill presses, enabling stable and controlled cutting. The saw teeth geometry is optimized for effective chip evacuation in wood and plastics and for reducing heat buildup when cutting thin metals.

Suitable for

• Creating pass-through holes for electrical conduit and cable glands
• Drilling openings for plumbing pipes and fixtures
• Cutting circular holes in wooden panels, MDF and plywood
• Making holes in thin sheet metal and plastic panels
• Use with hand drills and drill presses for workshop and site work

Key specifications

• Cutting diameter: 75 mm
• Material: bi-metal blade (high-speed steel cutting edge bonded to flexible steel back)
• Recommended material thickness: suitable for wood, plastics and thin metals (see tool and machine limits)
• Mounting: compatible with standard drill arbors and quick-change adapters
• Application: manual drilling and machine-assisted drilling

How to use

Select a compatible arbor and secure it properly in the drill chuck or press spindle. Mark the center point of the desired hole and use a pilot drill or center punch if necessary to prevent wandering. Position the hole saw perpendicular to the work surface, start drilling at low speed to establish the cutting track, then increase speed and apply steady, moderate feed pressure. Clear chips periodically and cool or lubricate when cutting metal as appropriate. After cutting, remove the cut disc from the saw cup and deburr the hole edges if required.

Usage recommendations

Use appropriate personal protective equipment (safety glasses, gloves and hearing protection). Match drill speed and feed to the material: lower speeds for metals, higher speeds for wood and plastics. When cutting metal, use cutting fluid or intermittent drilling to reduce heat and extend cutting life. Inspect the saw for wear before use and replace if teeth are damaged or excessively worn.